diff --git a/CHANGELOG.md b/CHANGELOG.md
index 542a836..05b1330 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### v4.0.3 (Jun 29, 2022)
+- Fixed bugs
+  - Pending message doesn't serialize propery when `UserMessageCreateParams.mentionedUsers` is set with a `Member` object
+  - Canceled messages not being removed from the `MessageCollection`
+  - The `requestId` of a pending message differs from the scheduled message (and the actual sent message)
+
 ### v4.0.2 (Jun 28, 2022)
 - Changed `GroupChannel.createScheduledUserMessage` and `GroupChannel.createScheduledFileMessage` to return corresponding `SendingStatus.PENDING` message object.
 - Fixed a bug where when reconnected, an updated message gets removed and added again in `MessageCollection`.
diff --git a/README.md b/README.md
index d1fe0c5..e97485f 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Platform](https://img.shields.io/badge/platform-android-orange.svg)](https://github.com/sendbird/sendbird-chat-sdk-android)
 [![Languages](https://img.shields.io/badge/language-kotlin-orange.svg)](https://github.com/sendbird/sendbird-chat-sdk-android)
-[![This version of 'sendbird-chat' @ Cloudsmith](https://api-prd.cloudsmith.io/v1/badges/version/sendbird/release/maven/sendbird-chat/4.0.2/a=noarch;xg=com.sendbird.sdk/?render=true)](https://cloudsmith.io/~sendbird/repos/release/packages/detail/maven/sendbird-chat/4.0.2/a=noarch;xg=com.sendbird.sdk/)
+[![This version of 'sendbird-chat' @ Cloudsmith](https://api-prd.cloudsmith.io/v1/badges/version/sendbird/release/maven/sendbird-chat/4.0.3/a=noarch;xg=com.sendbird.sdk/?render=true)](https://cloudsmith.io/~sendbird/repos/release/packages/detail/maven/sendbird-chat/4.0.3/a=noarch;xg=com.sendbird.sdk/)
 [![Commercial License](https://img.shields.io/badge/license-Commercial-brightgreen.svg)](https://github.com/sendbird/sendbird-chat-sdk-android/blob/main/LICENSE.md)
 
 ## Table of contents
@@ -90,7 +90,7 @@ Then, add the dependency to the project's top-level `build.gradle` file:
 ```gradle
 dependencies {
     ...
-    implementation 'com.sendbird.sdk:sendbird-chat:4.0.2'
+    implementation 'com.sendbird.sdk:sendbird-chat:4.0.3'
     ...
 }
 ```
@@ -103,7 +103,7 @@ TLS 1.3 is enabled by default in Sendbird SDK for Android. To disable it, please
 
 ```gradle
 dependencies {
-    implementation ('com.sendbird.sdk:sendbird-chat:4.0.2') {
+    implementation ('com.sendbird.sdk:sendbird-chat:4.0.3') {
         exclude group: 'org.conscrypt', module: 'conscrypt-android'
     }
 }